JVC RX-6032VSL Service Manual page 20

RX-6032VSL
4.12 LC72136N (IC121) : PLL frequency synthesizer
• Pin layout
FM/AM
CLOCK
DO
FM/ST/VCO
AM/FM
SDIN
• Block diagram
• Pin function
Pin
Symbol I/O
No.
1 XT I
2 FM/AM O
3 CE I
4 DI I
5 CLOCK I
6 DO O
7 FM/ST/VCO O
8 AM/FM O
9 LW I/O Input/output port
10 MW I/O Input/output port
11 SDIN I/O Data input/output
12 IFIN I
1-20 (No.22012)
XT 1 XT
22
2
GND
21
CE 3 LPFOUT
20
DI 4 LPFIN
19
5
PD
18
6
VCC
17
7 FMIN
16
8 AMIN
15
9
14
10 IFCONT
13
11 IFIN
12
1
22
16
1/2
15
3
4
C B
2
I/F
5
6
Power
on
17
Reset
21
Function
X'tal oscillator connect (75kHz)
LOW:FM mode
When data output/input for 4pin(input)
and 6pin(output): H
Input for receive the serial data from
controller
Sync signal input use
Data output for Controller Output port
Low: MW mode
Open state after the power on reset
IF counter signal input
Reference
Driver
Swallow Counter Swallow Counter
1/16,1/17 4bit 1/16,1/17 4bit
12bit
Programmable
DriverS
Data Shift Register & Latch
7 8 2 11 13
Pin
Symbol
No.
13 IFCONT
14
15 AMIN
16 FMIN
17 VCC
18 PD
19 LPFIN
20 LPFOUT
21 GND
22 XT
Phase
Detector
18
Charge Pump
19
20
Unlock
Detector
12
Universal
Counter
I/O Function
O IF signal output
- Not use
I AM Local OSC signal output
I FM Local OSC signal input
- Power suplly(VDD=4.5-5.5V)
When power ON:Reset circuit move
O PLL charge pump output
(H: Local OSC frequency Height than
Reference frequency.
L: Low Agreement: Height impedance)
I Input for active lowpassfilter of PLL
O Output for active lowpassfilter of PLL
- Connected to GND
I X'tal oscillator(75KHz)